Apparatus for making glass-coated pipe coils



0m. 11, 1932. G. VON DEN STEINEN 1,882z347 APPARATUS FOR MAKING GLASS GOATED PIPE COILS v Filed Dec. 14, 1928 2 Sheets-Sheet 1 f @fi-1- Oct. 11, 1932. G. vom DEN STEANEN 1,882,347

APPARATUS FOR MAKING GLASS COATED PIPE COILS Filed Dec. 14. 1928 Sheets-Sheet 2 ings.

Patented Oct. 11, 1932 UNITEDSTAT-Es PATENT `'oI-"iflce7A GUSTAV VON DEN STEINEN, OF CLEVELAND IIEIGHTS, OHIO, ASSIGNOR COMPANY, 0F EUCLID, OHIO, A CORPORATION OF OI-IIO APPARATUS FOR MAKING GLASS-COATED PIPE COIIiS Application filed December 14,` 19-28.. Serial No. 326,027.e

`This invention relates generally to the application of vitreous or fused coatings to articles, and has particular reference to apparatus for making pipe coils having such coat- In coating a coil or otherV article with glass it is customary to apply the coating material in the form of a powder, and then heat'the article in a furnace to approximately 1800o F., at which temperature the powder is Vfused and converted into an impervious coating. At this temperature steel and other available metals become so soft thatl it is a difficult problem to support a coil during the coating process so as to preventthe convolutions of the coil from being distorted and warped.

It is the object of this invention to provide a novel form of apparatus for producing glass-coated pipe coils which will have the desired shape and Vnot be distorted and Warped.:

Other objects and advantages of this invention will be apparent from the following description taken in connection with the accompanying drawings7 of which- Fig. 1 is a plan view of my coil supporting apparatus showing a coil supported therein;

Fig. 2 is a sectional view on line 2-2 ,of the apparatus shown in Fig. l;

Fig. 3 is a sectional viewof the coil taken onv line 3 3 of Fig. 2;

Fig. 4 is a detail section, taken on line 4-4 of Fig. 2, showing the upper portion of the central column of the coil;

Fig. 5 is a detail elevation showing one of the coil supporting rods; j'

Fig. 6 is a cross-section, taken on line 6 6 of Fig. 5, showing one of the `coil supporting nipples; and

Fig. 7 is kan'elevation showing a plug for closing the supporting nipples.

Referring now in detail to the drawings of which Figs.. 1 and 2 showy a coil 10 prepared for coating and supported within a framework indicated generally at 11. It should be understood that the work supporting apparatus of my invention may be used in connection with pipe coils of various shapes and formsbut the coil shown in this instance is formed from two lengths of pipe 12and 13 are connectedat points 180Q 'as shown in Fig. 4, to a dischargeAfitting 16,

by which the coil maybe tached thereto, as byvwelding, to provide a suitable connection for a fluid supply-line and also to provide a rigid connection ifor centrally supporting the coi-l during the 'coating process, as will be morefully disclosed To THE vGLAscorr.

bent to helical form,-"asindicatedat 12 and hereinafter. Theupper ends offhelicalcoils apart,

which I prefer to constructin the'form of a sleeve, arranged concentrically with column 14 and welded to the4 upper portion thereof. The diameter of sleeve 16 is materially larger than the diameter of column 14 and of the supply pipe leading to column 14, so that the space 17, between sleeve16 and the supply pipe, will serve as a discharge passage for coil 10. To facilitate the Welding of sleeve 16 to column 14 the wall ofthe `lower end portion 16 ofsleeve 16 is flanged or bent inwardlyv to oircumferentially engage column 14, while at the opposite'end of sleeve 16 I provide an annular enlarged portion 18,

attached tothe paratus with which it is to be used and to which a discharge connection may be conveniently applied.

-For rigidly supporting the coil during the coating process I provide the framework 11, composed of members welded or otherwise vsecurely fastened together to form a base portion 19, having uprights 20 upon which an annular member 21 is mounted. A cross`- beam 22 extends diametrically across annular member 21 and carries a tubular projection 23 welded thereto from which coil 10 is suspended with its axis in alignment with the axis of the projection. Adjacent its free end projection '23 Vcarries a removable pin 24 ioo engage the lower Vumn 14, whic which extends l diametrically through the walls of the projection. In order to support the coil centrally a piece of pipe is connected to the nipple 15 carried by column 14 by means of a Vpipe coupling 26. .Vhen the upper end of pipe 25 is slippedover projection 23 perforaticns provided in pipe 25 reg-- ister with the perforations of the projection so as to admit the pin 24 which couples the parts together. f

For supporting the coil about its perimeter I provide a carrier which includes a flanged coil supporting member or ring 27 to which the coil is connected at spaced points about the perimeter of the coil. This supporting ring 27`is carried by a central hub 28 to which it is connected by bars 29 e2:- tending radially outwardly from the hub and having at their outer ends hooks 30 which flange 'of ringV 27 and are welded thereto. kThe hub 28 is'of suitable diameterjto permit it to be slipped over pipe 25 and is provided with aligned slots 31 which register with the perforations of pipe 25 and ofprojection 23 to receive pin 24 upon which the hub is supported. At the top of the coil, atpoints spaced about its perimeter, I provide internally threaded nipples 32 which are welded to the convolutions at one end of the coil, as shown in Figs. 2 and 5. Supporting rods'33 are provided for connecting the coil to supporting ring 27 and have one end threaded and screwed into nip'- ples 32.' At theirfop'posite ends rods 33 are welded to ring 27 and to the hooks 30 of bars 29.4 Notches are -cut in the lower flange of ring 27 to receive the rods 33 to permit them to be welded to the web of ring 27 along a portionV of their length. To make the coil a rigid unit and to prevent sagging and distortion of its convolutions, I weld spacers 34 between adjacent convolutions aligned axially with the nipples 32. The Vcolextends coaXially of the coil,

connects and' supports the end convolutions thereof, and thus adds materially to the rigidity of the coil as a unit.'v

After the coil has been attached to the ring 27 and `suspended from the frame 11, 'the coating material is applied to the entire surface of the coil including the spacers 34, the

nipples 32 and the column 14. The supporting frame and the suspended'coil are then placed vin afurnace which is brought to the temperature necessary to fuse the coating material. After cooling, the coil is removed .from the frame by withdrawing pin 24 and is disconnected from supporting ring 27 Vby Ycutting rods 33. Thestub ends of rods 33 are unscrewed from nipples 32, and plugs 35 are then screwed into these nipples and sealed with litharge orvother suitable material.

When the supporting'frame and the coil lare heated to thc high temperature necessary to fuse thecoating material, the metal of the in rows supporting frame loses its rigidity and its members tend to buckle and twist out of shape. However, by my method of constructing and uniformly supporting the coil as a substantially rigid unit, the distortion and twisting of themembers of lthe supporting frame can have no deleterious effect on the coil so long as the coil does not contact with the supporting frame. It will be seen that I have provided an arrangement in which the coilv is supported at its center and also at points around its perimeter so that each ofthe several convolutions of the coil is supported and rigidly held in properly spaced relation by the aligned spacers 34.

The ring 27 which visheavy and yrigidLL-iup- Y ports the coil evenly around its perimeter and prevents warping and distortion, while the column 14, connected to the projection 23, affords a central support and rigidly maintains the coil in proper alignment.l

IVhile I have referred, in this specification and also in the claims,-to a glass-coated coil v limit my invention to the particular form of coil and coil supporting meansherein'shown and described, since these forms are illustrative only, but regard my invention as including such forms as fall within the scope of the appended claims.A Y

I-Ia-ving thus described my invention, what I claim is:

1. In apparatus for glass-coating a pipe coil of the type having a plurality of convolutions, the combination of, a frame, and means for supporting the coil in said frame while it is being treated, said means comprising a substantially rigid carrier having supporting connection withfsaid coil at a plurality of points in alignmentwith the convolutions of the coil, and means for supporting the carrier substantially centrally thereof on the frame.

2. In apparatus for glass-coating a pipe j coil of the type having a plura-lity`-of-convolutions and a central column, the combination of, a frame, means carried by said frame for supporting the coil out of Contact with the frame while Vit is being treated, said means having supporting connection with I use the term glassthe central column and with the convolutions of said coil. Y f y Y 3. In apparatus for glass-coating a pipe coil of the type having a plurality of convolutions and a central column, the combination of, a frame, a coil supporting member on said frame, said member having supporting connection with said column,and means carried by said member having supporting connection with one end of the coil in alignment with the convolutions thereof.

4. In apparatus for glass-coating a pipe coil of the type having a plurality of convolutions and a central column, the combination of, a frame, means carried by said frame for supporting the coil with its column in substantially vertical position while the coil is being treated, said means comprising a member having supporting connection with said column and adapted to prevent lateral deflection thereof, and an annular member having supporting connection with one end of the coil in alignment with the convolutions thereof.

5. In apparatus for glass-coating a pipe coil 0f the type having a plurality of convolutions with spacers between adjacent convolutions, the combination of, a frame, and means on said frame for supporting the coil out of contact with the frame while it is being treated, said means having supporting connection with one end of the coil in alignment with the spacers thereof,

6. In apparatus for glass-coating a pipe coil of the type having a central column and a plurality of convolutions with spacers therebetween, the combination of, a frame, a

Vcoil supporting member on said frame, said member having supporting connection with said column, and means carried by said member having supporting connection with the coil at points in alignment with said spacers.

7. In apparatus for glass-coating a pipe coil of the type having a plurality of convolutions, the combination of, a frame, and means for suspending the coil in said frame but out of contact therewith while it is being treated, said means comprising a member on said frame, a sleeve carried by said member, a plurality of arms extending laterally from said sleeve, an annular member supported by said arms, and means connecting said annular member with one end of said coil at a plurality of points in alignment with the convolutions of the coil.

8. In apparatus for glass-coating a pipe coil of the type having ak central column and a plurality of convolutions, the combination of, a frame, and means for suspending the coil in said frame but out of contact therewith while it is being treated, said means comprising a member on said frame having supporting connection with said column, a sleeve carried by said member, a plurality of arms extending laterally from said sleeve, an annular member supported by said arms, and means connecting said annular member with one end of said coil at a plurality of points in alignment with the convolutions of the coil.

9. In coating apparatus of the character described, the combination of a framehaving a supporting portion thereon, an annular article supporting element adapted for supporting connection at a plurality of points with the article carried thereby, and means for removably suspending said element from said supporting portion, the last mentioned means including a part disposed substantially on the axis of said element and having releasable telescoping engagement with said supporting portion.

In testimony whereof, I vhereunto aflix my signature. i

GUSTAV voN DEN STEINEN. 

